I just see it as a sign for a lasting product. The seller believes in the reliability of the product, so he offers an extended warranty. So I prefer to buy things where the warranty is offered, but I don't take the warranty.

Never had a bluetooth headset, but if you just leave it on all the time, wouldn't you get annoyed by having to recharge the battery so often?

But is there anything that stops merchants from buying unlocked phones abroad, and selling them in the USA?

I meant a protocol that uses more bandwidth for normal SMS, not just broadcasts. That way everyone can communicate by SMS, because phone calls and data don't block all the bandwidth.

I also think that this stuff should not explode in a fire normally. Heat alone will not make it explode, there must be high pressure too. The fertilizer might explode if it is stored in a closed metal tank, but probably not if it is stored on a pile or in sacks. This would mean that they stored it in a dangerous way.

Yes, a special emergency protocol would be good, that reserves most of the band with for SMS and emergency services. And of course for people who pay extra.

I also agree with you about the start menu. That is something they messes up by making the scroll window so small.

You can turn everything off in Windows 7 and make it look like Windows XP. Actually that is what I did.

As far as I know AMS was built to look for antimatter, not for dark matter. The antimatter is just an explanation that they came up with to explain an excess of positrons. They were looking for anti-Helium to find out if there are larger amounts of antimatter somewhere in the universe.

Makes me wonder why cyan magenta and yellow sensors were not used from the beginning. It should be as easy to build as RGB, but it should also get more light since only a smaller part of the spectrum needs to be blocked for each pixel.

Everyone knows that Obelix did it, at the time of Kleopatra's regency.

Or maybe charge people for these services?

Also the Smart came out at about the same time as the Prius. That was the car that people with too much money bought for the city in Europe. I just see that its gas mileage is even better than that of the Prius, and it has the advantage that it is easier to find a parking place.

Yeah, I don't know the numbers.
In Germany the sales for the Prius are really bad. If you drive so much through cities and want to save money you are thinking about public transport, not a hybrid. And I remember reading that the fuel efficiency of the Prius becomes horrible when you go fast on the Autobahn, since the engine is not built for high power.

One important point is missing: If they are worth it depends on if you are driving in cities or on highways. On highways the hybrid design has no advantage over a conventional car, it only saves fuel when starting and stopping often or when driving slow.